Cosmological Infrared Subtractions & Infrared-Safe Computables
High Energy Physics - Theory
2025-06-27 v3 General Relativity and Quantum Cosmology
Combinatorics
Abstract
Cosmological observables in perturbation theory turn out to be plagued with infrared divergences, which represents both a conceptual and computational challenge. In this paper we present a proof of concept for a systematic procedure to remove these divergences in a large class of scalar cosmological integrals and consistently define an infrared safe computable in perturbation theory. We provide diagrammatic rules which are based on the nestohedra underlying the asymptotic structure of such integrals.
Keywords
Cite
@article{arxiv.2405.19979,
title = {Cosmological Infrared Subtractions & Infrared-Safe Computables},
author = {Paolo Benincasa and Francisco Vazão},
journal= {arXiv preprint arXiv:2405.19979},
year = {2025}
}
Comments
15 pages, 4 figures in Tikz